火花流式阅读不是从Kafka的主题
我已经在Ubuntu上设置了Kafka和Spark。我正在尝试阅读Kafka的主题通过火花流使用pyspark（Jupyter笔记本）。Spark既没有读取数据，也没有抛出任何错误。
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Kafka生产者：bin/kafka-console-producer.sh--broker-list localhost:9092--topic new_topic
Kafka使用者：bin/kafka-console-consumer.sh--bootstrap-server localhost:9092-topic new_topic--from-begint
Pyspark代码（Jupyter笔记本）：
#!/usr/bin/env python
# coding: utf-8
import os
os.environ['PYSPARK_PYTHON'] = '/usr/bin/python3'
os.environ['PYSPARK_SUBMIT_ARGS'] = '--packages
org.apache.spark:spark-streaming-kafka-0-8_2.11:2.3.2 pyspark-shell'
import findspark
findspark.init('/home/shekhar/spark-2.3.2-bin-hadoop2.7')
import pyspark
import sys
from pyspark import SparkConf,SparkContext
from pyspark.streaming import StreamingContext
from pyspark.streaming.kafka import KafkaUtils
from uuid import uuid1
if __name__=="__main__":
#sconf = SparkConf().setAppName("SparkStr").setMaster("local")
sc = SparkContext(appName="SparkStreamingReceiverKafkaWordCount")
sc.setLogLevel("WARN")
ssc = StreamingContext(sc,2)
broker,topic = sys.argv[1:]
kvs = KafkaUtils.createStream(ssc,"localhost:9092","raw-event-
streaming-consumer",{topic:1})
lines = kvs.map(lambda x: x[1])
lines.pprint()
ssc.start()
ssc.awaitTermination()
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Time: 2019-01-30 00:52:18
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Time: 2019-01-30 00:52:20
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Spark-submit命令：
bin/spark-submit
--packages org.apache.spark:spark-streaming-kafka-0-8_2.11:2.3.2 SparkKafka-Copy1.py localhost:9092 new_topic
--master spark://localhost:4040
spark-submit on terminal的输出如下：
Ivy Default Cache set to: /home/shekhar/.ivy2/cache
The jars for the packages stored in: /home/shekhar/.ivy2/jars
:: loading settings :: url = jar:file:/home/shekhar/spark-2.3.2-bin-hadoop2.7/jars/ivy-2.4.0.jar!/org/apache/ivy/core/settings/ivysettings.xml
org.apache.spark#spark-streaming-kafka-0-8_2.11 added as a dependency
:: resolving dependencies :: org.apache.spark#spark-submit-parent-0698f154-2d3f-4d56-b2c5-099190b947df;1.0
confs: [default]
found org.apache.spark#spark-streaming-kafka-0-8_2.11;2.3.2 in central
found org.apache.kafka#kafka_2.11;0.8.2.1 in central
found org.scala-lang.modules#scala-xml_2.11;1.0.2 in central
found com.yammer.metrics#metrics-core;2.2.0 in central
found org.slf4j#slf4j-api;1.7.16 in central
found org.scala-lang.modules#scala-parser-combinators_2.11;1.0.4 in central
found com.101tec#zkclient;0.3 in central
found log4j#log4j;1.2.17 in central
found org.apache.kafka#kafka-clients;0.8.2.1 in central
found net.jpountz.lz4#lz4;1.2.0 in central
found org.xerial.snappy#snappy-java;1.1.2.6 in central
found org.spark-project.spark#unused;1.0.0 in central
:: resolution report :: resolve 617ms :: artifacts dl 19ms
:: modules in use:
com.101tec#zkclient;0.3 from central in [default]
com.yammer.metrics#metrics-core;2.2.0 from central in [default]
log4j#log4j;1.2.17 from central in [default]
net.jpountz.lz4#lz4;1.2.0 from central in [default]
org.apache.kafka#kafka-clients;0.8.2.1 from central in [default]
org.apache.kafka#kafka_2.11;0.8.2.1 from central in [default]
org.apache.spark#spark-streaming-kafka-0-8_2.11;2.3.2 from central in [default]
org.scala-lang.modules#scala-parser-combinators_2.11;1.0.4 from central in [default]
org.scala-lang.modules#scala-xml_2.11;1.0.2 from central in [default]
org.slf4j#slf4j-api;1.7.16 from central in [default]
org.spark-project.spark#unused;1.0.0 from central in [default]
org.xerial.snappy#snappy-java;1.1.2.6 from central in [default]
---------------------------------------------------------------------
| | modules || artifacts |
| conf | number| search|dwnlded|evicted|| number|dwnlded|
---------------------------------------------------------------------
| default | 12 | 0 | 0 | 0 || 12 | 0 |
---------------------------------------------------------------------
:: retrieving :: org.apache.spark#spark-submit-parent-0698f154-2d3f-4d56-b2c5-099190b947df
confs: [default]
0 artifacts copied, 12 already retrieved (0kB/25ms)
2019-01-30 18:40:19 WARN Utils:66 - Your hostname, shekhar-VirtualBox resolves to a loopback address: 127.0.1.1; using 10.0.2.15 instead (on interface enp0s3)
2019-01-30 18:40:19 WARN Utils:66 - Set SPARK_LOCAL_IP if you need to bind to another address
2019-01-30 18:40:19 WARN NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Exception in thread "main" java.io.IOException: Cannot run program "python": error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at org.apache.spark.deploy.PythonRunner$.main(PythonRunner.scala:100)
at org.apache.spark.deploy.PythonRunner.main(PythonRunner.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52)
at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:894)
at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:198)
at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:228)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:137)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
at java.lang.ProcessImpl.start(ProcessImpl.java:134)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
... 12 more
2019-01-30 18:40:19 INFO ShutdownHookManager:54 - Shutdown hook called
2019-01-30 18:40:19 INFO ShutdownHookManager:54 - Deleting directory /tmp/spark-e6d0532c-3593-4c28-8bb6-6d48aedb12f3
共有1个答案
现在解决了。我必须设置PYTHONPATH并将其导出到.bashrc文件中的路径中。
PYTHONPATH=/usr/bin/python3
export PATH=$PATH:$PYTHONPATH/bin
在createstream下的main函数中,zookeeper端口被更改为2181,错误地给出了9092。
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